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Product Description
This is a fixed-speed, single-stage screw air compressor operating at 7.5 kW (approximately 10 horsepower). It is driven by a conventional asynchronous motor with a fixed speed, and the output volume is adjusted by start-stop control.
Product Features
1. Simple Structure, Durability: The technology is mature, the structure is relatively simple, the failure rate is low, and maintenance is easy.
2. Low Initial Investment Cost: Compared to permanent magnet variable frequency drives of the same power, the purchase price is generally lower.
3. Wide Applicability: As a standard industrial product, the parts are highly universal, making them easy to purchase and repair.
Disadvantages (compared to permanent magnet variable frequency drives):
• High Energy Consumption: The motor starts and stops frequently, consuming a large amount of wasted power when not loaded, resulting in low overall energy efficiency.
• Air Pressure Fluctuations: Using upper and lower pressure limits, the air pressure fluctuates within a certain range, making it less stable than a variable frequency drive.
• High Starting Shock: The high starting current at the mains frequency causes a certain impact on the power grid. • Noisier: When running at a fixed speed, the noise changes significantly when starting and stopping.
Applicable industries
Suitable for small to medium-sized applications with stable, intermittent, and non-continuous gas demand, such as:
• Small repair shops and auto repair shops
• Small hardware processing plants and woodworking shops
• Self-employed spray painting and purge operations
• As an auxiliary or backup air source within a factory
FAQ
Q1: What is the main difference between a VFD and a variable frequency air compressor?
A: The main difference lies in the control method. It operates on a "start-and-stop" cycle, like an old-fashioned air conditioner; whereas a VFD operates on a "speed adjustment" cycle, like a newer VFD. Therefore, a VFD is more energy-efficient and provides more stable air pressure.
Q2: Why does it consume more electricity?
A: Because the motor's starting current is high, and even when no-load (not producing air but still rotating), it consumes 20%-40% of the rated power, resulting in high long-term electricity costs.
Q3: Is it suitable for 24-hour continuous operation?
A: Not likely. Frequent starts and stops accelerate wear on the motor and contactor, leading to increased failure rates and shortened lifespan. For continuous operation, a VFD should be preferred.
Q4: What are the key maintenance points?
A: Regular replacement of the air filter, oil filter, and lubricating oil (screw oil) is key to ensuring its lifespan and performance. Maintenance must be carried out strictly according to the time required by the manufacturer.
Product Description
This is a fixed-speed, single-stage screw air compressor operating at 7.5 kW (approximately 10 horsepower). It is driven by a conventional asynchronous motor with a fixed speed, and the output volume is adjusted by start-stop control.
Product Features
1. Simple Structure, Durability: The technology is mature, the structure is relatively simple, the failure rate is low, and maintenance is easy.
2. Low Initial Investment Cost: Compared to permanent magnet variable frequency drives of the same power, the purchase price is generally lower.
3. Wide Applicability: As a standard industrial product, the parts are highly universal, making them easy to purchase and repair.
Disadvantages (compared to permanent magnet variable frequency drives):
• High Energy Consumption: The motor starts and stops frequently, consuming a large amount of wasted power when not loaded, resulting in low overall energy efficiency.
• Air Pressure Fluctuations: Using upper and lower pressure limits, the air pressure fluctuates within a certain range, making it less stable than a variable frequency drive.
• High Starting Shock: The high starting current at the mains frequency causes a certain impact on the power grid. • Noisier: When running at a fixed speed, the noise changes significantly when starting and stopping.
Applicable industries
Suitable for small to medium-sized applications with stable, intermittent, and non-continuous gas demand, such as:
• Small repair shops and auto repair shops
• Small hardware processing plants and woodworking shops
• Self-employed spray painting and purge operations
• As an auxiliary or backup air source within a factory
FAQ
Q1: What is the main difference between a VFD and a variable frequency air compressor?
A: The main difference lies in the control method. It operates on a "start-and-stop" cycle, like an old-fashioned air conditioner; whereas a VFD operates on a "speed adjustment" cycle, like a newer VFD. Therefore, a VFD is more energy-efficient and provides more stable air pressure.
Q2: Why does it consume more electricity?
A: Because the motor's starting current is high, and even when no-load (not producing air but still rotating), it consumes 20%-40% of the rated power, resulting in high long-term electricity costs.
Q3: Is it suitable for 24-hour continuous operation?
A: Not likely. Frequent starts and stops accelerate wear on the motor and contactor, leading to increased failure rates and shortened lifespan. For continuous operation, a VFD should be preferred.
Q4: What are the key maintenance points?
A: Regular replacement of the air filter, oil filter, and lubricating oil (screw oil) is key to ensuring its lifespan and performance. Maintenance must be carried out strictly according to the time required by the manufacturer.
